1. Multiple Choice: Which hormone is primarily responsible for the onset of labor in pregnant women? a) Estrogen b) Progesterone c) Oxytocin d) Prolactin Correct Answer: c) Oxytocin Rationale: Oxytocin plays a crucial role in initiating labor contractions and is often referred to as the "labor hormone." 2. True/False: The APGAR score is a rapid method for assessing the health of a newborn immediately after birth. Answer: True Rationale: The APGAR score assesses Appearance, Pulse, Grimace, Activity, and Respiration within the first minutes after birth to quickly determine a newborn's physical condition. 3. Fill-in-the-Blank: The most common cause of postpartum hemorrhage is __________. Correct Answer: Uterine atony Rationale: Uterine atony, the failure of the uterus to contract adequately after delivery, is the leading cause of postpartum hemorrhage.